I am planning to switch from Bell to Koodo in August when my contract is up and I have a few questions. If I take in my old Bell phone, what do I need for Koodo to unlock it?
Also, if I use my old Bell phone for Koodo, then after it gets unlocked, does the format and layout change ? Thank you.
You don't get Koodo to unlock it, you need to contact Bell and have them unlock it as only the carrier it's from can unlock it.
Bring your unlocked phone to Koodo and pop in the Koodo SIM card and away you go. If you mean the set up as in your phone Homescreen switching it will if it's a Samsung phone and you'll have to set everything up again as it performs a factory reset (so back up everything prior) but others I don't believe do this. At least I haven't come across it.